diff --git a/rig-core/src/tool.rs b/rig-core/src/tool.rs
index 8c4b8cc..953bae4 100644
--- a/rig-core/src/tool.rs
+++ b/rig-core/src/tool.rs
@@ -204,6 +204,17 @@ where
     }
 }
 
+#[cfg(feature = "mcp")]
+impl From<mcp_core::types::Tool> for ToolDefinition {
+    fn from(val: mcp_core::types::Tool) -> Self {
+        Self {
+            name: val.name,
+            description: val.description.unwrap_or_default(),
+            parameters: val.input_schema,
+        }
+    }
+}
+
 #[cfg(feature = "mcp")]
 #[derive(Debug, thiserror::Error)]
 #[error("MCP tool error: {0}")]